Charles Ellicott Commentary Romans 4:11

"and he received the sign of circumcision, a seal of the righteousness of the faith which he had while he was in uncircumcision; that he might be the father of all them that believe, though they be in uncircumcision, that righteousness might be reckoned unto them;" — Romans 4:11 (ASV)

The sign of circumcision—that is, circumcision as a sign. The expression is an instance of what is known in Greek as the “genitive of apposition,” but it is common in English. Thus we speak of the City of London, the County of Kent.

Abraham is the father:

1. Of faithful uncircumcised—he himself being so.
2. Of circumcised, but only of faithful circumcised.

A seal of the righteousness . . .—The Apostle here puts forth his view of the real import of circumcision. It was not (as so many of his contemporaries supposed) the cause or condition of Israel’s privileges so much as the sign or ratification of them. It ratified a state of things already existing when it was instituted. Hence, to those who inherited that state of things (justification by faith), the lack of circumcision was no bar.

On verses 9-12:

What is the bearing of this upon the relation between Jew and Gentile? Is the blessedness of the justified state reserved only for the former? Is it limited to those who are circumcised? On the contrary, the state of justification was attributed to Abraham himself before he was circumcised. Justification is the result of faith, not of circumcision. Circumcision is so far from superseding faith that it was only the sign or seal of it.

This, then, is the great test. Those who have it may hope for justification, whether their descent from Abraham is spiritual or literal.